User Manual

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Siemens Building Technologies SED2 Advanced Operator Panel AOP CM1B5192en
HVAC Products Faults & Warnings 19.01.2004
9.3 Simultaneous Faults and Warnings
If a SED2 VSD or network of VSDs reports a fault condition and a warning condition, the AOP displays all mes-
sages by cycling through them. The AOP first displays a fault message and then a warning message separated
by a 2-second interval.
This cycle continues until all fault and warning messages display. The cycle repeats itself until all fault mes-
sages are either acknowledged or cleared and the conditions causing the warning messages cease to exist.
9.4 SED2 VSD Fault/Warning Record
For a VSD that connects to an AOP, the diagnostic menu provides access to recent fault history. In MASTER
mode, a two-digit USS slave address identifies each SED2 VSD.
Note: Regarding fault history, the AOP time display function is only available if the AOP was connected to
the SED2 VSD at the time of the fault.
Use the following procedure to access the AOP diagnostics facilities:
1. From the main menu, use
and to scroll through the list of options and to highlight the DIAGNOS-
TICS item.
Press
to confirm the selection.
2. If no fault history exists, press
or to return to the main menu.
3. If a fault history exists, use
and to scroll through the fault history. Simultaneously press and
to display the help screen which contains details of the relevant corrective action.
Press and hold
to return to the main menu.